Messages in this thread Patch in this message | | | From | Robert Baldyga <> | Subject | [PATCH 2/6] serial: samsung: alloc dma stucture in ourport | Date | Wed, 10 Dec 2014 12:49:23 +0100 |
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When we have "dmas" property in serial node in device-tree, we do memory alocation for dma structure which will be used in DMA handling code.
Based on previous work of Sylwester Nawrocki and Lukasz Czerwinski.
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com> --- drivers/tty/serial/samsung.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 19273e3..7196a3e 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1209,6 +1209,18 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, ret = platform_get_irq(platdev, 1); if (ret > 0) ourport->tx_irq = ret; + /* + * DMA is currently supported only on DT platforms, if DMA properties + * are specified. + */ + if (platdev->dev.of_node && of_find_property(platdev->dev.of_node, + "dmas", NULL)) { + ourport->dma = devm_kzalloc(port->dev, + sizeof(*ourport->dma), + GFP_KERNEL); + if (!ourport->dma) + return -ENOMEM; + } ourport->clk = clk_get(&platdev->dev, "uart"); if (IS_ERR(ourport->clk)) { -- 1.9.1
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